Operating Instructions MBI 46.51.39
Version 0.9
en MBI 46.51.39 operating instructions.docx
Issue: 08/2022
page 21 from 29
5.6.1 Adjustment process for symmetrical transducers
With symmetrical displacement transducers, the electrical zero point is in the middle of the
nominal measuring stroke. Typically, the voltage output of the amplifier also provides a
symmetrical output signal for a symmetrical displacement transducer.
•
For
zero-point adjustment
, remove the core from the transducer and set the output signal
of the amplifier to 0 V with the zero-point potentiometer. Then insert the core rod back into
the displacement transducer and fix it in the center position so that the output signal is again
zero. Small corrections with the zero-point potentiometer after mechanical adjustment are
permissible.
If the zero-point setting is not possible in the manner described, then you can alternatively
bring the core into a position in which the displacement transducer delivers the same
minimum value both with the usual connection and with swapped signal connection pin 6
and 7.
•
Perform the
phase-shift adjustment
by moving the core to approx. 75% of the stroke and
now set the output signal to its highest possible value / maximum by means of the phase
potentiometer.
•
For
gain adjustment
, move the core to the end of the nominal
range and set the voltage
to the desired output signal with the gain potentiometer. Then check the setting at the
beginning of the nominal range and correct it slightly if necessary. If adjusting the output
signal via the potentiometer setting range is not sufficient, switch the JP2 jumper to a
different sensitivity range.
5.6.2 Adjustment process for asymmetrical transducers (WP series)
The zero point of an unbalanced displacement transducer is typically at the beginning of the
nominal measuring range. As a rule, the measuring amplifiers for unbalanced displacement
transducers are set in such a way that they have an output signal of 0...10 V or 4... 20mA .
•
For
zero point adjustment
, bring the sheath anchor of the displacement transducer to the
mechanical zero position (measure A) according to the data sheet and set the output signal
of the measuring amplifier to 0 V with the zero point potentiometer.
•
You perform
the phase adjustment
by moving the sheath anchor shortly before the end
of the (nominal) measuring range and setting the maximum of the output signal with the
phase potentiometer. If necessary, the gain setting must be adjusted. Then check the zero
point setting and correct it if necessary.
•
For
gain adjustment,
move the sheath anchor to the
end of the (nominal) measuring range
and then set the output signal to the setpoint with the gain potentiometer.
If adjusting the
output signal via the potentiometer's adjustment range is not sufficient for gain, change the
JP2 jumper to a different sensitivity range (see 5.4.1).
